It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please see http://www.burgertuning.com/emissions_info.html for more information on legal requirements related to use of BMS parts.

Well that was a failed experiment I guess, the car ran so rough today it almost wasn't driveable. I reset the o2 adaptions a few times with the BT software and it didn't seem to improve anything, so I've moved the sensors back pre-turbo.

How many O2 sensors does the N55 use and where are they place? Has anyone dug into the N55 DME logic to see what the differences are between it and the N54? If someone were to find those different sections, could they be used to rewrite the N54 DME logic so that we could run N55 O2 placements?

i guess im missing the point.. having the front 02 sensors pre turbo in separate banks on the manifold is not an issue. You just put spacers there and ur done. I havent had a single 02 sensor issue in 5 months of beating on the car

i drive it daily when I'm home. and I beat the $#@! out if it. I'll post pics in the morning from the computer. I really don't think this is an issue. shiv is doing the same thing. if its working on my car I don't see why it wouldn't on others ?

i drive it daily when I'm home. and I beat the $#@! out if it. I'll post pics in the morning from the computer. I really don't think this is an issue. shiv is doing the same thing. if its working on my car I don't see why it wouldn't on others ?

Have you gotten a jig manufactured for your manifold yet? If you wanna be a hero, that's what you do

Are you running 3 sensors post turbo? Looks like it in the pic, maybe one is for a wide band datalogger or something. Also daily driving it and beating on it is fine, what kills these things is mileage seeing that heat. How many miles total do you have on those O2's pre turbo. Its good news to see that they are hanging in their though.

Are you running 3 sensors post turbo? Looks like it in the pic, maybe one is for a wide band datalogger or something. Also daily driving it and beating on it is fine, what kills these things is mileage seeing that heat. How many miles total do you have on those O2's pre turbo. Its good news to see that they are hanging in their though.

the third was just plugged, its now for my wideband.

those are all the same 02 sensors i left the shop with. probably around 2-3K miles not sure. But very few easy miles lol

All 4 of mine are currently in the process of getting replaced. I paid $89.52 each for Bosch 17098 (pre-cats) and $89.32 for Bosch 16795 (post-cats) off Amazon. They're pretty good prices, especially with free Amazon Prime two-day shipping.

Has anyone tried tricking the coolant temp of the engine to keep the temp below the closed loop enable?

Does anyone know the closed loop enable temp - potentially we could scrub the hex for this value and do some experimenting. Despite what I've read in other threads I dont see how holding the car in OL would be a problem once you line up the rest of the tune.

All 4 of mine are currently in the process of getting replaced. I paid $89.52 each for Bosch 17098 (pre-cats) and $89.32 for Bosch 16795 (post-cats) off Amazon. They're pretty good prices, especially with free Amazon Prime two-day shipping.

you are the CHEAPEST e90 owner. i hope you bought your car used for $12k. otherwise.....

Everyone loves when you post

I suggested they manufacture the product that they designed and undercut the competition and make a profit...how does that make me cheap? Speaking of cheap I would still love to see cast log manifolds for a grand or less. Throw on a QSV and call it a day.

Has anyone tried tricking the coolant temp of the engine to keep the temp below the closed loop enable?

Does anyone know the closed loop enable temp - potentially we could scrub the hex for this value and do some experimenting. Despite what I've read in other threads I dont see how holding the car in OL would be a problem once you line up the rest of the tune.

That might work; but unfortunately you would defeat the purpose of having wideband O2 sensors in the first place. The DME wouldn't be able to adjust A/F ratio on the fly. This is especially convenient if you run meth.